Nannotax3 - ntax_mesozoic - Anfractus parvus <title>Nannotax3 - ntax_mesozoic - Anfractus parvus

Anfractus parvus


Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Anfractus -> Anfractus parvus
Sister taxa: A. harrisonii, A. parvus, A. variabilis, A. youngii, A. sp.

Distinguishing features:
Parent taxon (Anfractus): Elliptical, cavate (and usually septate) holococcoliths, often bearing hollow spines. Distal surfaces may be perforate and there may be internal buttresses.
This taxon: Small Anfractus species with a sharply tapering spine and low rim


Taxonomy:

Citation: Anfractus parvus Bown 1993
Rank: Species

Farinacci & Howe catalog pages: A. parvus *

Distinguishing features:
Parent taxon (Anfractus): Elliptical, cavate (and usually septate) holococcoliths, often bearing hollow spines. Distal surfaces may be perforate and there may be internal buttresses.
This taxon: Small Anfractus species with a sharply tapering spine and low rim


Morphology:


Size:
ca 1.5µm


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: holococcolith, elliptical, hollow, CA: ca_disjunct, process, CROSS-POLARS: rim-unicyclic, R-prominent,
Lith size: 1->2µm;
Data source notes: holotype +/-0.5 µm
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Aalenian Stage (170.30-174.15Ma, top in Aalenian stage). Data source: original description
First occurrence (base): within Toarcian Stage (174.15-182.70Ma, base in Toarcian stage). Data source: original description

Plot of occurrence data:

References:

Bown, P. R. (1993). New holococcoliths from the Toarcian-Aalenian (Jurassic) of northern Germany. Senckenbergiana Lethaea. 73: 407-419. gs


nannotaxlogo400px

Anfractus parvus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-2-2023

Taxon Search:
Advanced Search
AphiaID: not found
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10019 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics